Innovation Meets Safety: Building a Safer Future for Energy Storage Systems
As battery energy storage expands, evolving standards and large-scale fire testing are helping ensure new systems are deployed safely.
- By Josh Dinaburg
- Apr 27, 2026
Energy storage systems are central to one of the most important transformations of our era: the shift to electrification. From grid-scale storage to residential backup power to electric vehicles, batteries are the backbone of cleaner, more resilient energy systems. For manufacturers and designers, that momentum has created enormous opportunities. For policymakers and regulators, it has raised urgent questions about how to confirm new technologies are deployed safely and responsibly, without putting operators and technicians at risk.
Standards as the Foundation
Continuously evolving standards have driven today’s batteries to be safer and more reliable than ever before. Frameworks that address lithium-ion performance, thermal safety, transportation and system-level integration provide a common language for manufacturers, regulators, inspectors and other stakeholders. By reducing uncertainty, they help build confidence across the battery and energy storage sector and remove barriers that might otherwise slow product development or deployment.
Standards do not stand still. They represent years of collaboration among engineers, safety experts, policymakers and industry partners, and they must continue to adapt as technologies and applications change. Ongoing testing, certification and research are essential to supporting standards in keeping pace with new use cases, helping the industry manage risk while enabling innovation. Application of a Certification Mark provides visual evidence to technicians and end users that the products meet these evolving safety Standards. CSA Group and other testing bodies play a key role in providing independent evaluation and insights that help inform standards, R&D and policy decisions.
Where Innovation Creates New Considerations
The versatility of battery energy storage makes it a critical component of the rapidly changing energy landscape, helping bridge the gap between energy producers and consumers. Within this framework, several trends are reshaping how batteries perform and what safety requires.
Integration of battery energy storage into broader applications, evolving battery chemistries and sizes, full-scale testing of fire and explosion protection systems and improved design against propagating failures are all driving new safety considerations and planning requirements. Fast-charging expectations are creating new thermal management challenges as systems charge and discharge energy more rapidly.
At the same time, batteries are being installed in harsher environments, from remote arctic substations to scorching desert solar farms or corrosive marine desalination plants—where real-world variables don’t always match laboratory assumptions. And as more electric-vehicle batteries find second lives in stationary systems, developers are grappling with how age, use history and degradation affect both battery system performance and the severity and likelihood of cell failures.
These dynamics don’t replace existing standards; they challenge us to build on them, adding new considerations that test programs, designers, technicians and operators must account for to make informed decisions.
The Role of Safety Testing
Batteries are stressed and driven to failure under controlled conditions in testing laboratories, including mechanical damage, electrical abuse and environmental stressors. Some stresses are so great that they drive cells into thermal runaway, a condition where the electrical energy rapidly becomes heat that breaks down the chemicals inside to produce flammable gases and fire following physical damage, electrical faults or operational failures. For workers on-site, thermal runaway is not just a technical failure mode; it can mean intense heat, toxic gas release and rapidly escalating fire conditions.
The 2026 edition of NFPA 855, Standard for the Installation of Stationary Energy Storage Systems, shifts how energy storage systems are evaluated for fire safety by requiring large-scale fire testing (LSFT). LSFT involves intentionally igniting a fire in a fully populated, charged energy storage system, allowing its contents to burn to observe how the system behaves during a severe fire event. This test primarily evaluates that the design of the ESS, including insulation barriers and physical spacings, does not allow a fire to spread beyond the origin.
Beyond product certification, LSFT provides critical data for fire departments and emergency responders that support safer response protocols, clearer risk assessments and more informed decisions about firefighting tactics.
Unlike component-level or small-scale laboratory tests, LSFT evaluates system-level performance in as-built configurations. Compliance with NFPA 855 demonstrates a focus on safety outcomes rather than on theoretical testing, providing a framework to mitigate fire risk and improve workplace safety.
Testing generates data that helps identify not just whether a battery meets requirements, but how it behaves under more demanding conditions. For example, overcharging batteries to induce thermal runaway helps engineers understand and quantify the severity and potential for propagation of cell failures at maximum or higher states of charge, so they can innovate with confidence.
Alternatively, documenting how older batteries perform after years of service can support safety decisions about reuse and recycling. CSA Group and other certification bodies translate these insights into guidance that informs product development, operational best practices and regulatory frameworks.
Shared Responsibility Across the Ecosystem
Safety in energy storage doesn’t occur at a single moment; it continues throughout the product lifecycle.
It begins with manufacturers understanding how systems might behave under stress and evaluating and installing built-in protective features to help improve workplace safety. Independent testing then pushes those designs beyond normal conditions, revealing failure modes and generating insights needed to inform stakeholders in making purchasing and deployment decisions.
Once systems are installed, day-to-day safety relies on integrators and operators: thoughtful installation decisions, monitoring practices and predictive maintenance help identify risks early and prevent minor issues from becoming safety incidents. Clear labeling, accessible emergency disconnects, adequate spacing and worker training all help reduce risk during routine maintenance and unexpected fault conditions. These considerations are especially important for second-life batteries, which may behave differently from first-life systems and demand closer attention to performance and degradation.
As real-world lessons accumulate, regulators and standard developers translate them into updated expectations and requirements. And when batteries reach the end of their first life, recyclers and second-life developers draw on those same insights to safely reuse or retire systems.
When each of these steps reinforces the others, innovation accelerates rather than stalls, supported by the continuous loop of testing, feedback and data from operators and technicians and updated standards that evolve alongside rapidly advancing technology.
Looking Ahead: Safety as a Partner to Innovation
Changes in battery size, chemistry, capacity and demand bring tremendous promise, while raising new questions about the continued application and global growth of energy storage. Safety is not an obstacle to innovation; it is its partner. It gives industry the freedom to deploy quickly, scale responsibly and trust new technologies in real-world environments.
By combining standards, testing, predictive insights and shared responsibility, the industry can scale energy storage safely, sustainably and reliably. The question is not whether batteries will define our energy future, but whether we will match that future with the vigilance and collaboration it demands.
This article originally appeared in the April/May 2026 issue of Occupational Health & Safety.